Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5328177 | Contaminant resistant piston seal with energized backup scrapers | Paul Daniel Parker | 1994-07-12 |
| 4674754 | Back-up means for fluid cylinder and method for using same | Verle D. Lair | 1987-06-23 |